linux-kernel - Re: [PATCH 5/6] sound/core/pcm

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Date:	Thu, 28 Jul 2011 15:13:51 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Julia Lawall <julia@...u.dk>
Cc:	Jaroslav Kysela <perex@...ex.cz>, kernel-janitors@...r.kernel.org,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] sound/core/pcm_compat.c: adjust array index

At Thu, 28 Jul 2011 14:46:05 +0200,
Julia Lawall wrote:
> 
> From: Julia Lawall <julia@...u.dk>
> 
> Convert array index from the loop bound to the loop index.
> 
> A simplified version of the semantic patch that fixes this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression e1,e2,ar;
> @@
> 
> for(e1 = 0; e1 < e2; e1++) { <...
>   ar[
> - e2
> + e1
>   ]
>   ...> }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>

Thanks, applied now.


Takashi

> 
> ---
> Not tested.
> 
>  sound/core/pcm_compat.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff -u -p a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
> --- a/sound/core/pcm_compat.c
> +++ b/sound/core/pcm_compat.c
> @@ -342,7 +342,7 @@ static int snd_pcm_ioctl_xfern_compat(st
>  			kfree(bufs);
>  			return -EFAULT;
>  		}
> -		bufs[ch] = compat_ptr(ptr);
> +		bufs[i] = compat_ptr(ptr);
>  		bufptr++;
>  	}
>  	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
> 
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